So you would like to use Chinese or European appliances in America or vice versa? The Beleeb 2000W 110 to 220v Converter (ST-2000VA) can help. It is an automatic voltage transformer with a digital display to show current and voltage. This voltage converter comes with overvoltage, over temperature, overload, and short circuit protection.
The ST-2000VA uses color codes to let you know when you are overloading it. It has a 8-second soft start function and works for both step up and down voltage conversion.